Feed mechanism for arc lights



(No Model.)

W. W. STREET.

FEED MECHANISM FOR ARG LIGHTS.

No. 869,568. Y Patented Sept. 6, 1887.

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PATENT OFFICE.

VILLOUGHBY W. STREET, OF SPRINGFIELD, MASSACHUSETTS.

FEI-:D MECHANISM FOR ARC LIGHTS.

SPECIFICATION forming part of Letters Patent No. 369,568, dated September 6, 1 B87.

Application filed April 5, 1886. Renewed June 14, 1867. Serial No. 241,314. (No model.)

To all whom, it may concern:

Be it known that I, VVILLOUGHBY W. STREET, of Springfield, in the county ofHampden and State of Massachusetts, have invented certain Improvements in Feed Mechanisms for Electric-Arc Lamps, of which the following is a specification. 1

This invention relates to an escapement of peculiar construction, adapted more particularly for use in electric lamps to control the descent of the upper-carbon carrier.

"While the invention is, susceptible -of embodiment in different forms for application to different lamps, I have represented in the drawings a forni which is more particularly adapted for use in lamps of the Brush type', such as shown in Letters Patent of the United States No. 219,209. f

Referring to the accompanying drawings, Figure 1 represents an edge view of my device, partly in section, on the line x a; of Fig. 2, as it appears when applied to a lamp. Fig. 2 represents a vertical transverse section on the line y y of the preceding iigure. Fig. 3 is a horizontal section on the line z z of Figs. 1 and 2, looking upward. Fig. 4 is a perspective view ofthe pallet. Figs. 5 and 6 are diagrams illustrating the manner in which the escapement-wheel causes the vibration of the pallet.

Referring to the drawings, A represents a tubular gravitating carbon-carrier having its upper end enlarged to form a chamber in the ordinary manner. v

` B represents a secondary rack-bar secured at its upper end to the frame ofthe lamp,and extending downward within the carbon-carrier to co-operate with the escapement C, which is seated in the upper end of the carrier, and thus controls the descent of the carrier and carbon.

a represents the top plate of the escapement mechanism, secured firmly to the top of the carrier A, and provided with two depending arms or plates, b and c, to support the various arbors. A horizontal pinion, d, having its arbor seated in the plates, engages the teeth of the rack, and is connected through friction dement-wheel g, having peripheral teeth beveled or inclined on one side. These teeth act on pins h and t', secured rigidly to the vibrating pallet or framej, which is mounted on horizontal pivots and provided at its two ends with weights or weighted arms 7c. The escapement is made of a rectangular form with a vertical opening through its center for the passage of the rack-bar, its journals being projected, as shown, on opposite sides, so that it is supported on both sides of the rack-bar.

The studs or pins h and'i project inward from the inner vertical walls of the opening toward the rack-bar, and the edge of the escapement-wheel passes upward inside of the escapement adjacent to the bar, as shown. The pins are arranged in relation to each other and to the journals of the escapement, as shown in'Figs. 4, 5, and 6. As the carbon-holder descends by gravity,the stationary rack imparts motion through the pinion and intermediate parts to the escapement-wheel in the direction indicated by the arrow in the several figures. The teeth of the escapement-wheel act to lift the two pins h and t' alternately, thereby imparting the vibratory motion to the pallet, the resistance of which, based uponfamiliar laws, retards the motion, so that the parts are properly limited in speed. By changing the weight ofthe arms, and to a limited extent by changing the size of the weights, the speed may be modied as demanded.

If desired, the weights may be screwed upon the arms, and thus adapted for adjustment to and from the aXis.

The essence of my invention resides in the construction of the escapement with a central opening for the passage of the rack-bar therethrough, and with pins arranged to act, as described, in connection with the toothed wheel.

It is manifest that the form of the escapement-frame and the details of the gearing may be' modified at will.

As my invention relates solely to the escapement, Ihave omitted from the drawings those other parts of the lamp which will be of ordinary construction.

Having thus described my invention, what I claim is- 1. In an electric lamp, in combination with a gravitatin g carbon-carri er, the stationary rackbar and an eseapement mechanism attached to the carrier and engaging the rack, said es eapement embracing a` vibratory pallet having a vertical opening for the passage of the raclbar therethrough.

2. An eseapement mechanism for an electric la1np,embraeing a rack-har7 apinion engaging the same, a vihratory pallet having an opening through which the rack-bar extends7 and intermediate devices, substantially as described, i'or imparting motion from the pinion to the pallet.

3. The combination of the raelrbar, the vibratory pallet provided with an opening for the passage of the .rack therethrough7 the es cape-Wheel acting upon the pallet, and gear connecting said eseapewheel. with the lamp.

WLLOUGHBY XV. STREET.

XVitnesses:

Crus. L. Turnus, EDWIN F. LYFORD. 

